Solar Array + Filigree Sages + Zirda, the Dawnwaker

Solar Array

Filigree Sages

Zirda, the Dawnwaker

How it works

1. Activate Solar Array by tapping it, adding and causing the next artifact spell you cast this turn to have sunburst.
2. Activate Filigree Sages by paying , untapping Solar Array.
3. Repeat as desired.
4. Cast any artifact spell, triggering its sunburst ability an infinite number of times, either putting infinite +1/+1 counters on charge counters on the artifact.

This loop relies on Solar Array to generate colored mana while setting up an artifact-buffing effect, paired with Filigree Sages to continuously untap the mana source. Normally, untapping the Sages would cost two mana, but Zirda, the Dawnwaker steps in to reduce that activation cost, making the untap ability cheap enough to break even with the mana produced. Because Solar Array's mana-tapping ability also grants your next artifact spell sunburst, repeating this sequence lets you accumulate arbitrary amounts of mana to supercharge whatever artifact you cast next with infinite +1/+1 or charge counters.